From: roland <for_spam_at_gmx.de>
Date: Fri, 7 May 2004 00:06:56 +0200

Hi!
Ordered a 1.8" Hitachi Travelstar C4K40 and got it delivered today.
>From my first point of view:
works like a charm - and my feeling is, that my ajbrec is even more "responsive" -
i.e. when browsing/ffwing the songs, it seems to be a little bit quicker
than the 2.5" model i had before.
ssssiiiiiiiiiipp - much higher noise than a 2.5" hdd :)

now i need to watch out for the 5->3.3V power converter to save real power and
get really long runtime.... :)

btw: i wasn`t into "electronics" for some time now, could someone recommend
a good and cheap solution, to measure voltage/current with the pc (over a longer
time period) ?
a cheap multimeter with pc-interface with appropriate datalogging software ?
an a/d converter with usb interface and easy to use (turtle grahpics? ;) scripting?)
programming interface, to write your own datalogger ? i would probably buy such and
post the resulting current-diagrams. i don`t have my "conrad electronics" (german
radioshack equivalent) by hand - and browsing their website isn`t really fun.

regards
roland





----- Original Message -----
From: "roland" <for_spam_at_gmx.de>
To: "Rockbox development" <rockbox_at_cool.haxx.se>; <idc-dragon_at_gmx.de>
Sent: Thursday, April 22, 2004 8:35 PM
Subject: Re: 1,8" HDD for ajb ?


> > The Player/Recorder models use the battery voltage directly, not so easy
> > there.
> we would need an additional dc/dc-converter, right ?
> these exist in form of integrated circuits and have very few power consumption.
>
> these ones
> http://www.maxim-ic.com/appnotes.cfm/appnote_number/725
> seem to be too "weak" for doing their job in an archos (hdd needs more current),
> but maybe someone knows a cheap, powerful, low-power 5.0->3.3V converter-ic ?
>
> i think it`s difficult to give an estimation, how much power is being saved and
> how much more runtime an ajb would get - but if it`s >3-4 hrs additional runtime,
> i would probably buy such disk.
> i did a quick compare - and it seems this hdd (at 3.3V) consumes half of the power
> of an ordinary 2.5" hdd
> so i think it`s worth to discuss further - isn`t it ?
> changing the hdd to this model should probably give a SIGNIFICANT runtime benefit,
> imho.
>
> regards
> roland
>
>
>
> ----- Original Message -----
> From: "[IDC]Dragon" <idc-dragon_at_gmx.de>
> To: "Rockbox development" <rockbox_at_cool.haxx.se>
> Sent: Thursday, April 22, 2004 10:36 AM
> Subject: Re: 1,8" HDD for ajb ?
>
>
> > > Wouldn`t that fit into an archos , giving even longer runtime ?
> > >
> > http://www.hitachigst.com/tech/techlib.nsf/techdocs/4B0BCB1DB47911A386256D5500494CDC/$file/HGSTTravelstarC4K40.PDF
> > > looks like a standard 2,5"hdd mechanical interface to me.
> >
> > Yes it will fit, these drives are mechanically like half a 2.5" drive. The
> > connector end is the same.
> > The supply is nominally 3.3V now, but also tolerates 5V at the cost of
> > higher consumption.
> > If mounted into an FM/V2, you could modify the supply to give less than 5V.
> > Those models have a DC/DC converter to make 5V from the LiIon voltage which
> > can then be bypassed.
> > The Player/Recorder models use the battery voltage directly, not so easy
> > there.
> >
> > Jörg
> >
> > --
> > NEU : GMX Internet.FreeDSL
> > Ab sofort DSL-Tarif ohne Grundgebühr: http://www.gmx.net/dsl
> >
> > _______________________________________________
> > http://cool.haxx.se/mailman/listinfo/rockbox
> >
>

_______________________________________________
http://cool.haxx.se/mailman/listinfo/rockbox
Received on 2004-05-07